11-3. HOME RETURN SEQUENCE
The operating sequence of home return are as follows.
1. Determine the contact logic of home sensor at Setup-25 "I5/HS".
2. Determine the contact logic of left limit sensor at Setup-26 "I6/LL".
3. Determine the contact logic of right limit sensor at Setup-27 "I7/RL".
4. Determine the direction of limit sensors. at Setup-40 "LTDIR".
5. Set the allowed time for safe home return at Setup-11 "HTIME".
6. Home return is started toward the direction designated by Setup-18 "HMDIR".
Moving speed is "home high speed" set by Setup-15 "HMSPD".
Acceleration and deceleration time is set by Setup-17 "HMACC".
7. If it meets the limit sensor, it moves back to the opposite direction to find the home sensor and
home return is done. It certainly occurs when home return starts from the state that the system
passed the home sensor. Hence, if there is not limit sensor, this case is not applicable.
8. When it finds the home sensor, then it decelerates to the home creep speed (Setup-16 "HMCPD").
And it moves toward the designated direction (set by Setup-12 "HTYPE") to search the off-edge
position of home sensor at home creep speed. If encoder Z phase is not used (Setup-14
"HMZPH"=0), the off-edge position of home sensor becomes the mechanical home position.
9. If encoder Z phase is used (Setup-14 "HMZPH"=1), it continues to move for searching the encoder
Z phase at home creep speed. And that position becomes the mechanical home position.
10. After the mechanical home is set by home sensor or encoder Z phase, the 2nd home (work home)
is set by moving the amount of offset value. The unit of offset value is determined by Setup-05
"BUNIT", moving speed is determined by Setup-15 "HMSPD" and acc./dec. time is determined by
Setup-17 "HMACC". The 2nd home is called "work home" that is mainly used for the reference
position of working coordinate. After the 2nd home is completed, coordinate value is cleared.
11-4. HOME RETURN ERROR
If home return is not successful within the allowed time owing to the malfunction of home sensor,
amplifier, mechanical error, etc., or if the input 5 doesn't function as "external home sensor". the home
return stops and error message is displayed as follows.
S Y S T E M
E R R O R : 0 9
H O ME
O V E R
T I ME
Summary of Contents for Tango-B series
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